Hoshizaki STACKABLE CRESCENT CUBER KM-1301SAH-E Service Manual
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Hoshizaki STACKABLE CRESCENT CUBER KM-1301SAH-E Service Manual

Hoshizaki STACKABLE CRESCENT CUBER KM-1301SAH-E Service Manual

Stackable crescent cuber
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Stackable Crescent Cuber
Models
KM-1301SAH-E
KM-1301SWH-E
KM-1301SRH-E
SERVICE MANUAL
™
Number: 73181
Issued: 4-12-2011

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  • Page 1 Hoshizaki America, Inc. “A Superior Degree of Reliability” www.hoshizaki.com Stackable Crescent Cuber Models KM-1301SAH-E KM-1301SWH-E KM-1301SRH-E SERVICE MANUAL ™ Number: 73181 Issued: 4-12-2011...
  • Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.

  • Page 3: Table Of Contents

    This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualified service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary.
  • Page 4 III. Technical Information ... 25 A. Water Circuit and Refrigeration Circuit ... 25 1. KM-1301SAH-E (air-cooled) ... 25 2. KM-1301SWH-E (water-cooled) ... 26 3. KM-1301SRH-E (remote air-cooled) ... 27 B. Wiring Diagrams ... 28 1. Auxiliary Code T-0, U-0 ... 28 a) KM-1301SAH-E (air-cooled) ...

  • Page 5: Important Safety Information

    Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit. WARNING Indicates a hazardous situation which could result in death or serious injury. CAUTION Indicates a situation which could result in damage to the unit.

  • Page 6: Specifications

    I. Specifications A. Icemaker 1. KM-1301SAH-E (air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lb./day ( kg/day ) Reference without *marks FOR THE EUROPEAN MARKET ICE CAPACITY lb./day (kg/day) SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 7: Km-1301Swh-E (Water-Cooled)

    2. KM-1301SWH-E (water-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lb./day ( kg/day ) Reference without *marks FOR THE EUROPEAN MARKET ICE CAPACITY lb./day (kg/day) SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 8: Km-1301Srh-E (Remote Air-Cooled)

    3. KM-1301SRH-E (remote air-cooled) AC SUPPLY VOLTAGE AMPERAGE MINIMUM CIRCUIT AMPACITY MAXIMUM FUSE SIZE APPROXIMATE ICE PRODUCTION PER 24 HR. lb./day ( kg/day ) Reference without *marks FOR THE EUROPEAN MARKET ICE CAPACITY lb./day (kg/day) SHAPE OF ICE ICE PRODUCTION PER CYCLE APPROXIMATE STORAGE CAPACITY ELECTRIC &...

  • Page 9: Condenser Unit

    B. Condenser Unit 1. URC-14FE Units: mm [in.] [2-15/16] TOP VIEW [36-13/16] [33-15/32] AIR FLOW [27-9/16] AIR FLOW [37-13/16] FRONT VIEW 907.2 [35-11/16] URC FAN MOTOR CONNECTION [12-3/16] 7/8" DIA OPENING...

  • Page 10: Specifications

    SPECIFICATIONS MODEL: URC-14FE AC SUPPLY VOLTAGE FAN MOTOR EXTERIOR DIMENSIONS (WxDxH) DIMENSIONS INCLUDING LEGS (WxDxH) EXTERIOR FINISH WEIGHT CONNECTIONS - ELECTRIC - REFRIGERANT CONDENSER FAN MOTOR PROTECTION REFRIGERANT CONTROL REFRIGERANT CHARGE DESIGN PRESSURE OPERATING CONDITIONS ACCESSORIES -SUPPLIED Note: We reserve the right to make changes in specifications and design without prior notice.

  • Page 11: General Information

    II. General Information A. Construction 1. KM-1301SAH-E (air-cooled) Inlet Water Valve Evaporator Assembly Cube Guides Check Valve (water) Water Pump Float Switch Compressor Separators Spray Tubes Control Switch Thermostatic Bin Control Low-Side Service Valve High-Side Service Valve Expansion Valves Water Supply Inlet Junction Box Control Box Fan Blade...

  • Page 12: Km-1301Swh-E (Water-Cooled)

    2. KM-1301SWH-E (water-cooled) Inlet Water Valve Evaporator Assembly Cube Guides Check Valve (water) Water Pump Float Switch Compressor Control Switch Mechanical Bin Control Separators Spray Tubes Low-Side Service Valve Transformer Box High-Side Service Valve Expansion Valves Water Supply Inlet Junction Box Hot Gas Valve Check Valves High-Pressure...

  • Page 13: Km-1301Srh-E (Remote Air-Cooled)

    3. KM-1301SRH-E (remote air-cooled) Inlet Water Valve Evaporator Assembly Cube Guides Check Valve (water) Water Pump Float Switch Compressor Mechanical Bin Control Separators Low-Side Service Valve Spray Tubes Control Switch Transformer Box High-Side Service Valve High-Side Liquid Service Valve Water Supply Inlet Hot Gas Valve Junction Boxes Check Valves...

  • Page 14: Sequence Of Operation

    B. Sequence of Operation KM-1301SAH-E utilizes a thermostatic bin control. For KM-1301SAH-E operation, the K4 jumper (4A4883G01) must be in place on the control board RED K4 connector or the unit will not operate. 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied, CB red "POWER OK" LED and green "BC CLOSED" LED come on. If red "POWER OK" LED is off on KM-1301SAH-E, clear ice away from the thermostatic bin control bulb in the storage bin area. If yellow "BC OPEN" LED is on, the unit will not start. In this case...

  • Page 15: C) Freeze Cycle

    c) Freeze Cycle LED 1 is on. Comp and FMR remain energized, PM energizes or remains energized depending on harvest pump timer (S4 dip switch 7) setting. FM and LLV energize. HGV and X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later) de-energize.
  • Page 16 (2) Mechanical Bin Control (KM-1301SWH-E, KM-1301SRH-E) When mechanical BC is activated (BC open), the yellow "BC OPEN" LED comes on. The unit then shuts down as outlined in the table below. Cycle at Shutdown Mechanical Bin Control Activation Fill Cycle 15 seconds after activation. Harvest Cycle At the end of the harvest cycle, or up to 15 seconds into the freeze cycle if activated at the end of the harvest cycle.

  • Page 17: Sequence Flow Chart

    2. Sequence Flow Chart...

  • Page 18: Control Board

    C. Control Board • A Hoshizaki exclusive solid-state control board is employed in Hoshizaki Stackable Crescent Cubers. • All models are pretested and factory set. 1. The control board is fragile; handle very carefully. 2. The control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 19: Control Board Layout

    1. Control Board Layout • Bin Control Switch • "ALARM RESET" Button Closed LED (green) (on continuously in thermostatic bin control application) • Bin Control Switch Open LED (yellow) (mechanical bin control application only) • Part Number • Alarm Buzzer •...

  • Page 20: A) Led Lights And Audible Alarm Safeties

    a) LED Lights and Audible Alarm Safeties At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when the control switch is moved to the "ICE" position. The red LED indicates proper control voltage and remains on unless a control voltage problem occurs. The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below.

  • Page 21: Controls And Adjustments

    However, a setting longer than the factory setting may be advised in cases where the flush provided at harvest needs to be prolonged for extra cleaning. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. Keep in mind that setting the harvest timer to a longer setting decreases 24-hour production.

  • Page 22: C) Pump-Out Timer (S4 Dip Switch 3 & 4)

    c) Pump-Out Timer (S4 dip switch 3 & 4) Do not adjust S4 dip switch 3 off and S4 dip switch 4 on for this model. Otherwise, pump motor does not rotate in the pump-out direction. When a pump-out is called for, the pump motor stops after the preceding freeze cycle. The pump motor restarts 2 seconds later in the reverse direction, taking water from the bottom of the tank and forcing pressure against the check valve seat allowing water to go through the check valve and down the drain.

  • Page 23: E) Harvest Pump Timer (S4 Dip Switch 7)

    After 2 consecutive freeze timer terminations, the control board shuts down the icemaker. In this case, see "IV.G.3. Low Ice Production" for possible solutions. The freeze timer is factory set, and generally no adjustment is required. Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for recommendations. CAUTION S4 Dip Switch Setting...

  • Page 24: H) Float Switch Control (S5 Dip Switch 1)

    h) Float Switch Control (S5 dip switch 1) Do not adjust. This must be left in the factory default position or the unit will not operate correctly. Factory set. S5 dip switch 1 allows for single or double float switch applications. The KM-1301SAH-E, KM1301SWH-E, and KM-1301SRH-E use a single float switch.

  • Page 25: Technical Information

    III. Technical Information A. Water Circuit and Refrigeration Circuit 1. KM-1301SAH-E (air-cooled)

  • Page 26: Km-1301Swh-E (Water-Cooled)

    2. KM-1301SWH-E (water-cooled)

  • Page 27: Km-1301Srh-E (Remote Air-Cooled)

    3. KM-1301SRH-E (remote air-cooled)

  • Page 28: Wiring Diagrams

    B. Wiring Diagrams 1. Auxiliary Code T-0, U-0 a) KM-1301SAH-E (air-cooled)

  • Page 29: Auxiliary Code U-1 And Later

    2. Auxiliary Code U-1 and Later a) KM-1301SAH-E (air-cooled)

  • Page 30: B) Km-1301Swh-E (Water-Cooled)

    b) KM-1301SWH-E (water-cooled)

  • Page 31: C) Km-1301Srh-E (Remote Air-Cooled)

    c) KM-1301SRH-E (remote air-cooled)

  • Page 32: Performance Data

    C. Performance Data 1. KM-1301SAH-E (air-cooled) APPROXIMATE ICE PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER...

  • Page 33: Km-1301Swh-E (Water-Cooled)

    2. KM-1301SWH-E (water-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER TOTAL HEAT OF REJECTION FROM COMPRESSOR...

  • Page 34: Km-1301Srh-E (Remote Air-Cooled)

    3. KM-1301SRH-E (remote air-cooled) APPROXIMATE ICE AMBIENT TEMP. PRODUCTION PER 24 HR. lbs./day kg./day APPROXIMATE ELECTRIC CONSUMPTION watts APPROXIMATE WATER CONSUMPTION PER 24 HR. gal./day /day FREEZING CYCLE TIME min. HARVEST CYCLE TIME min. HEAD PRESSURE PSIG kg/cm SUCTION PRESSURE PSIG kg/cm TOTAL HEAT OF REJECTION FROM CONDENSER...

  • Page 35: Service Diagnosis

    IV. Service Diagnosis 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Risk of electric shock. Use extreme caution and exercise safe electrical practices.
  • Page 36 4) Initial Harvest Cycle – LEDs 1, 4, and 2 are on. WV and X2 relay (auxiliary code T-0, U-0), X11 relay (auxiliary code U-1 and later) remain energized, HGV, X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later), Comp, and FMR energize. CB monitors the warming of the evaporator via the thermistor located on the suction line.
  • Page 37 an inoperative Comp, or an inoperative HM. If the unit switches out of freeze with F/S connector removed, but would previously not switch out of freeze with F/S connected (long freeze - 3 beep alarm), F/S may be sticking. To check and clean F/S, see "IV.D. Float Switch Check and Cleaning." If the unit remains in freeze longer than 15 seconds after disconnecting black F/S connector, replace CB. Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions.
  • Page 38 8) Shutdown a) Thermostatic Bin Control: KM-1301SAH-E When the unit is running hold ice in contact with the thermostatic bulb, the thermostatic BC switch opens within 10 seconds, shutting down the unit (CB red "POWER OK" LED is off). The bin control is factory set, and generally no adjustment is required. However, adjustment may be needed in some conditions, particularly at higher altitude locations.

  • Page 39: Control Board Check

    B. Control Board Check Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. Alarm Reset: If the control board is in alarm (beeping), press the "ALARM RESET" button on the control board while the control board is beeping. WARNING! Risk of electric shock.

  • Page 40: Bin Control Check

    C. Bin Control Check 1. Thermostatic Bin Control Check: KM-1301SAH-E To check the thermostatic bin control, follow the steps below. When the ambient temperature is below 45°F (7°C), the thermostatic bin control switch opens and shuts down the icemaker even if the ice storage bin is empty.
  • Page 41 7) Press the actuator paddle, check for continuity across the wires of the red connector. When the actuator paddle is engaged, the mechanical bin control switch is open. If closed, check that the actuator paddle is not restricted. Clean if necessary. See "IV.C.2.b) Mechanical Bin Control Cleaning." If the mechanical bin control switch still reads closed, replace the mechanical bin control.

  • Page 42: B) Mechanical Bin Control Cleaning

    5) Remove the actuator paddle from the switch mount. See Fig. 2. 6) Wipe down the mechanical bin control assembly with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Rinse the parts thoroughly with clean water. 7) Reassemble the mechanical bin control assembly and replace it in its correct position.

  • Page 43: Float Switch Check And Cleaning

    D. Float Switch Check and Cleaning The float switch is used to determine that there is sufficient water in the tank after the 1-minute fill cycle and after each harvest cycle. The float switch is also used to determine that the appropriate volume of water has been converted into ice before switching out of the freeze cycle.

  • Page 44: Float Switch Cleaning

    Be careful not to bend the retainer rod excessively when removing it. 7) Wipe down the float switch assembly's housing, shaft, float, and retainer rod with a mixture of 1 part Hoshizaki "Scale Away" and 25 parts warm water. Clean the inside of the rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water.

  • Page 45: Thermistor Check

    E. Thermistor Check To check thermistor resistance, follow the steps below. 1) Turn off the power supply. 2) Remove the front panel, then move the control switch to the "OFF" position. 3) Remove the control box cover. 4) Remove the thermistor. 5) Immerse the thermistor sensor portion in a glass containing ice and water for 2 or 3 minutes.

  • Page 46: Diagnostic Charts

    G. Diagnostic Charts Before consulting the diagnostic charts, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings."...
  • Page 47 No Ice Production - Possible Cause 14. Float Switch See "IV.D. Float Switch Check and Cleaning." 15. Compressor 16. Pump Motor 17. Pump-Out Check Valve 18. Water System 19. Fan Motor 20. Liquid Line Valve (if applicable) 21. Expansion Valve (TXV) 22. Headmaster (C.P.R.) (remote condenser unit) 23.

  • Page 48: Freeze Up

    2. Freeze Up Defrost and clean the unit prior to diagnosing freeze up. See "VI.A. Cleaning and Sanitizing Instructions." Freeze Up - Possible Cause 1. Evaporator 2. Separators 3. Cube Guide 4. Spray Tubes and/or Spray Guides 5. Refrigerant Charge 6. Ambient Temperature 7. Water Supply 8. Thermostatic Bin Control See "IV.C.1. Thermostatic Bin Control Check." 9. Control Board See "IV.B. Control Board Check."...
  • Page 49 Freeze Up - Possible Cause 1. Evaporator 2. Separators 3. Spray Tubes and/or Spray Guides 4. Refrigerant charge. 5. Check Valve 6. Control Board See "IV.B. Control Board Check." 7. Inlet Water Valve 8. Float Switch See "IV.D. Float Switch Check and Cleaning." 9. Pump Motor 10. Expansion Valve (TXV) 11.

  • Page 50: Low Ice Production

    3. Low Ice Production Low Ice Production - Possible Cause 1. Evaporator 2. Spray Tubes and/or Spray Guides 3. Refrigerant Charge 4. Water Supply 5. Control Board See "IV.B. Control Board Check." 6. Thermistor See "IV.E. Thermistor Check." 7. Hot Gas Valve 8. Inlet Water Valve 9.

  • Page 51: Replacement Of Components

    V. Replacement of Components 1. This unit should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire. 2. Move the control switch to the "OFF" position and turn off the power supply before servicing. Lockout/Tagout to prevent the power from being turned back on inadvertently.

  • Page 52: Brazing

    2. Brazing 1. R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). 2. R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. 3.
  • Page 53 For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled model, see the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

  • Page 54: Important Notes For Component Replacement

    Install a new capacitor. Thermistor • Attach the new thermistor to the suction line in the same location as the previous thermistor. • The thermistor should be at the 12 o'clock position on the tube. • Smoothly fill the recessed area of the thermistor holder with high thermal conductive type sealant. Hoshizaki America part number 4A0683-01 (Silicone Heat Sink Compound 10-8108 manufactured by GC Electronics), KE-4560 RTV (manufactured by ShinEtsu Silicones), or equivalent are recommended. • Secure the thermistor with the holder, then insulate it. • Be very careful to prevent damage to the leads. Foam Insulation CAUTION...

  • Page 55: Cleaning And Maintenance

    Consult with your local distributor about cleaning and maintenance service. To obtain the name and phone number of your local distributor, contact your nearest Hoshizaki Service office (listed in the Instruction Manual and at www.hoshizaki.com).
  • Page 56 5) Remove the drain plug located on the lower front part of the ice chute. See Fig. 6. Allow the water tank to drain. 6) Replace the drain plug in its correct position. Be careful not to cross thread it. 7) In bad or severe water conditions, clean the float switch assembly as described below.

  • Page 57: Sanitizing Procedure - Following Cleaning Procedure

    15) Move the control switch to the "ICE" position. 16) Replace the front panel in its correct position. 17) Turn on the power supply to fill the water tank with water. 18) Turn off the power supply after 3 minutes. 19) Remove the front panel. 20) Move the control switch to the "WASH" position. 21) Replace the front panel in its correct position. 22) Turn on the power supply to rinse off the cleaning solution.

  • Page 58: Maintenance

    B. Maintenance The maintenance schedule below is a guideline. More frequent maintenance may be required depending on water quality, the icemaker's environment, and local sanitation regulations. 1. Except as specified below, only qualified service technicians should attempt to service this icemaker. 2. Move the power switch to the "OFF" position and disconnect power before servicing.
  • Page 59 3) Close the icemaker water supply line shut-off valve, then open the icemaker water supply line drain valve. 4) Allow the line to drain by gravity. 5) Attach a compressed air or carbon dioxide supply to the icemaker water supply line drain valve.

This manual is also suitable for:

Km-1301srh-eKm-1301swh-e

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